/*
 * Copyright (c) 2014, Oracle America, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 *  * Neither the name of Oracle nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

package org.example;

import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 3)
@Measurement(iterations = 10, time = 10, timeUnit = TimeUnit.SECONDS)
@Threads(1)
@Fork(1)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
public class ListBenchmark {
    @State(Scope.Thread)
    public static class MyState {
        @Param(value = {"1000"})
        public int length;
        @Param(value = {"array","linklist"})
        public String type;

        @Setup(Level.Trial)
        public void doSetup() {
            if(type.equalsIgnoreCase("array")) {
                list = new ArrayList<>(length);
            }else {
                list = new LinkedList<>();
            }
            for (int i = 0; i < length; i++) {
                list.add(new Demo(i));
            }
            System.out.println("List Setup");
        }
        public List<Demo> list ;
    }
    @Benchmark
    public void test4ForLoop(MyState state, Blackhole blackhole) {
       List<Demo> list = state.list;
       int size = list.size();
       Long sum = 0L;
       for (int i = 0; i < size; i++) {
            Demo demo = list.get(i);
            sum+=demo.getId();
        }
       blackhole.consume(sum);
    }

    @Benchmark
    public void test4ForEachLoop(MyState state, Blackhole blackhole) {
        List<Demo> list = state.list;
        Long sum = 0L;
        for (Demo item:list) {
            sum+=item.getId();
        }
        blackhole.consume(sum);
    }

}
